Fetching details from the dictionary...
assistant inspector
彼はついに念願の警部補に昇進した。
He was finally promoted to his long-desired rank of assistant inspector.
新任の警部補が現場指揮を執った。
The newly appointed assistant inspector took command of the scene.
この難事件はベテラン警部補の経験が解決に導いた。
This difficult case was brought to resolution by the experience of a veteran assistant inspector.